A novel design of a microstripfed shorted square-ring slot antenna for circular polarization

Kow-Ming Chang*, Ren Jie Lin, I. Chung Deng, Qing Xiang Ke

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

The design of a circularly polarized slot antenna fed by a single microstrip line is presented. The circularly polarized radiation is achieved by means of using a shorted square-ring slot. This proposed antenna has the fundamental resonant frequency of 2.4 GHz with the minimum return loss of -50.44 dB. The impedance bandwidth is 930 MHz or 38.7% referred to the resonant frequency, and it also has the 3-dB axial-ratio (AR) bandwidth of 310 MHz or 12.9% referred to the resonant frequency. In addition, this proposed antenna shows good performance of circular polarization (CP) radiation with the range of the lower 3-dB AR value covering elevation angles between -40 to 40 degrees.

Original languageEnglish
Pages (from-to)1684-1687
Number of pages4
JournalMicrowave and Optical Technology Letters
Volume49
Issue number7
DOIs
StatePublished - 1 Jul 2007

Keywords

  • Axial ratio
  • Circular polarization
  • Microstrip line
  • Slot antenna

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